//
// ActiveRunnable.h
//
// Library: Foundation
// Package: Threading
// Module:  ActiveObjects
//
// Definition of the ActiveRunnable class.
//
// Copyright (c) 2004-2007, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier:	BSL-1.0
//


#ifndef Foundation_ActiveRunnable_INCLUDED
#define Foundation_ActiveRunnable_INCLUDED


#include "Poco/ActiveResult.h"
#include "Poco/AutoPtr.h"
#include "Poco/Exception.h"
#include "Poco/Foundation.h"
#include "Poco/RefCountedObject.h"
#include "Poco/Runnable.h"


namespace Poco
{


class ActiveRunnableBase : public Runnable, public RefCountedObject
/// The base class for all ActiveRunnable instantiations.
{
public:
    typedef AutoPtr<ActiveRunnableBase> Ptr;
};


template <class ResultType, class ArgType, class OwnerType>
class ActiveRunnable : public ActiveRunnableBase
/// This class is used by ActiveMethod.
/// See the ActiveMethod class for more information.
{
public:
    typedef ResultType (OwnerType::*Callback)(const ArgType &);
    typedef ActiveResult<ResultType> ActiveResultType;

    ActiveRunnable(OwnerType * pOwner, Callback method, const ArgType & arg, const ActiveResultType & result)
        : _pOwner(pOwner), _method(method), _arg(arg), _result(result)
    {
        poco_check_ptr(pOwner);
    }

    void run()
    {
        ActiveRunnableBase::Ptr guard(this, false); // ensure automatic release when done
        try
        {
            _result.data(new ResultType((_pOwner->*_method)(_arg)));
        }
        catch (Exception & e)
        {
            _result.error(e);
        }
        catch (std::exception & e)
        {
            _result.error(e.what());
        }
        catch (...)
        {
            _result.error("unknown exception");
        }
        _result.notify();
    }

private:
    OwnerType * _pOwner;
    Callback _method;
    ArgType _arg;
    ActiveResultType _result;
};


template <class ArgType, class OwnerType>
class ActiveRunnable<void, ArgType, OwnerType> : public ActiveRunnableBase
/// This class is used by ActiveMethod.
/// See the ActiveMethod class for more information.
{
public:
    typedef void (OwnerType::*Callback)(const ArgType &);
    typedef ActiveResult<void> ActiveResultType;

    ActiveRunnable(OwnerType * pOwner, Callback method, const ArgType & arg, const ActiveResultType & result)
        : _pOwner(pOwner), _method(method), _arg(arg), _result(result)
    {
        poco_check_ptr(pOwner);
    }

    void run()
    {
        ActiveRunnableBase::Ptr guard(this, false); // ensure automatic release when done
        try
        {
            (_pOwner->*_method)(_arg);
        }
        catch (Exception & e)
        {
            _result.error(e);
        }
        catch (std::exception & e)
        {
            _result.error(e.what());
        }
        catch (...)
        {
            _result.error("unknown exception");
        }
        _result.notify();
    }

private:
    OwnerType * _pOwner;
    Callback _method;
    ArgType _arg;
    ActiveResultType _result;
};


template <class ResultType, class OwnerType>
class ActiveRunnable<ResultType, void, OwnerType> : public ActiveRunnableBase
/// This class is used by ActiveMethod.
/// See the ActiveMethod class for more information.
{
public:
    typedef ResultType (OwnerType::*Callback)();
    typedef ActiveResult<ResultType> ActiveResultType;

    ActiveRunnable(OwnerType * pOwner, Callback method, const ActiveResultType & result) : _pOwner(pOwner), _method(method), _result(result)
    {
        poco_check_ptr(pOwner);
    }

    void run()
    {
        ActiveRunnableBase::Ptr guard(this, false); // ensure automatic release when done
        try
        {
            _result.data(new ResultType((_pOwner->*_method)()));
        }
        catch (Exception & e)
        {
            _result.error(e);
        }
        catch (std::exception & e)
        {
            _result.error(e.what());
        }
        catch (...)
        {
            _result.error("unknown exception");
        }
        _result.notify();
    }

private:
    OwnerType * _pOwner;
    Callback _method;
    ActiveResultType _result;
};


template <class OwnerType>
class ActiveRunnable<void, void, OwnerType> : public ActiveRunnableBase
/// This class is used by ActiveMethod.
/// See the ActiveMethod class for more information.
{
public:
    typedef void (OwnerType::*Callback)();
    typedef ActiveResult<void> ActiveResultType;

    ActiveRunnable(OwnerType * pOwner, Callback method, const ActiveResultType & result) : _pOwner(pOwner), _method(method), _result(result)
    {
        poco_check_ptr(pOwner);
    }

    void run()
    {
        ActiveRunnableBase::Ptr guard(this, false); // ensure automatic release when done
        try
        {
            (_pOwner->*_method)();
        }
        catch (Exception & e)
        {
            _result.error(e);
        }
        catch (std::exception & e)
        {
            _result.error(e.what());
        }
        catch (...)
        {
            _result.error("unknown exception");
        }
        _result.notify();
    }

private:
    OwnerType * _pOwner;
    Callback _method;
    ActiveResultType _result;
};


} // namespace Poco


#endif // Foundation_ActiveRunnable_INCLUDED
